This aftermarket Mercury Racing left-hand starter fits all SST-120, SST-140, Champ, F1, and S3000 2-stroke V6 race outboards manufactured from 1976 to  2005 with Left Hand (LH) Light Weight Flywheel Ring Gears found on OEM Race and PPE Flywheels; including all race left-hand (LH) counter-rotating turning 2.0, 2.4, and 2.5 liters.
 
Mercury & Mariner Racing Outboard Starter – 10-Tooth Bendix, 100-Tooth Flywheel

Designed specifically for Mercury and Mariner high-performance racing outboards, including SST-120 and S3000 series V6 2.0L, 2.4L, and 2.5L engines, this starter features a 10-tooth clockwise (CW) rotation Bendix drive matched to a 100-tooth flywheel ring gear. This configuration delivers a 10:1 gear ratio, optimized for fast, reliable starts under the extreme conditions of marine racing.
 
It is used in counter-rotation racing outboards and is critical for proper torque delivery and engagement precision. OEM part numbers include Mercury# 50-60594T01, 50-60594A1, and 50-60594A, and it is engineered exclusively for racing setups—not interchangeable with 8-tooth or 9-tooth systems found on standard production outboards. This 10-tooth starter system is essential for serious performance and professional marine racing applications.
 
Our starters come with a one-year API Marine warranty. 
 
Part Numbers
50-60594T01, 50-60594A1, 50-60594A
 
Includes one (1) Mercury outboard starter with a 10-tooth pinion starter drive gear (most common).
 
Contact Mike Hill with any questions at +1-714-697-1716 or mike@buckshotracing77.com